package com.example.demo.util;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * @author:lgl
 * @Description:
 * @Date:Create in 2018/1/11 .
 */
public class HtmlUtil {
    // 定义script的正则表达式
    private static final String regEx_script = "<script[^>]*?>[\\s\\S]*?<\\/script>";
    // 定义style的正则表达式
    private static final String regEx_style = "<style[^>]*?>[\\s\\S]*?<\\/style>";
    // 定义HTML标签的正则表达式
    private static final String regEx_html = "<[^>]+>";
    //定义空格回车换行符
    private static final String regEx_space = "\\s*|\t|\r|\n";

    /**
     * @param htmlStr
     * @return
     *  删除Html标签
     */
    public static String delHTMLTag(String htmlStr) {
        Pattern p_script = Pattern.compile(regEx_script, Pattern.CASE_INSENSITIVE);
        Matcher m_script = p_script.matcher(htmlStr);
        // 过滤script标签
        htmlStr = m_script.replaceAll("");

        Pattern p_style = Pattern.compile(regEx_style, Pattern.CASE_INSENSITIVE);
        Matcher m_style = p_style.matcher(htmlStr);
        // 过滤style标签
        htmlStr = m_style.replaceAll("");

        Pattern p_html = Pattern.compile(regEx_html, Pattern.CASE_INSENSITIVE);
        Matcher m_html = p_html.matcher(htmlStr);
        // 过滤html标签
        htmlStr = m_html.replaceAll("");

        Pattern p_space = Pattern.compile(regEx_space, Pattern.CASE_INSENSITIVE);
        Matcher m_space = p_space.matcher(htmlStr);
        // 过滤空格回车标签
        htmlStr = m_space.replaceAll("");
        // 返回文本字符串
        return htmlStr.trim();
    }

    /**
     * 获取去除html标签的文本内容
     * @param htmlStr
     * @return
     */
    public static String getTextFromHtml(String htmlStr){
        htmlStr = delHTMLTag(htmlStr);
        htmlStr = htmlStr.replaceAll(" ", "");
        return htmlStr;
    }
    public static void main(String[] args) {
        String str = "<div style='text-align:center;'><img src='124.png' class=''>整治“四风”清弊除垢<br/><span style='font-size:14px;'> </span><span style='font-size:18px;'>公司召开党的群众路线教育实践活动动员大会。</span><br/></div>";
        System.out.println("过滤前："+str);
        String result = getTextFromHtml(str);
        System.out.println("过滤后:"+result);
    }
}
